Fitting a dropper to Trek Marlin 7

Morning

My Trek Marlin 7 has internal routing on the down tube but no hole on the upright…

I want to get a bontrager line internal dropper but getting conflicting opinions as to if can route all internally or not!

Has anyone fitted an internal dropper to a Marlin 7 or any other bike without coming out near crank is this possible?

Many thanks

Sounds like you’d have to run the cable through the inside of the BB shell to get it into the seat tube, I’ve done that on my fat bike

The OH’s On One Whippet is like this – dropper cable routes internally down the seat tube, over the top of the BB and up the down tube before exiting just by the head tube.

Is there gonna be room down by the BB?

I don’t wanna but they can’t fit and I really don’t want an external one!

Or drill a little hole in the seat tube l